Sugar-cane mill.



A. P. EWART.

SUGAR GANE MILL.

APPLIOATION FILED mm1?, 1911.

1,061,535. Patented May13, 1913.

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fyi.

A. P. EWART.

SUGAR CANE MILL. APPLIoATIoN FILED 11011.17, 1911.

1,061,535. Patented May 13, 1913.

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mwwvvm- TINTTED STATES PATEN T OFFICE..

ARTHUR FREDERICK EWART, oFrneNoLnLUv, TERRITORY or HAWALI, AssleNon ToHoNoLuLU mon lwenns COMPANY, or lHoeroLUnU, HAWAII, A eonPoRATroN or THETERRITORY OF HAWAII.. I

SUGAR-CANE' MILL.

Specification of Letters Patent.

Application tiled November I7, 19H.

Patented May 13, 1.913. serial No. 660,768.

To all whom Ih5 may concern Be it known that I, ARTHUR FREDERICKlllwnn'r, a subject of the King of Great Britain, and a resident of thecity and county of Honolulu and Territory of Hawaii, have invented.certain new and useful Improvements in Sugar-Cane Mills; and I dohereby declare the following to be a full, clear, and exact descriptionofthe invention, such as will enable others skilled in theart to whichitappertains to make and use 'the same.

This invention relates to sugar-cane mills and particularly to thebearings for the journals of the top roller of three .roller mills.

It has for its object to provide bearings which will permit ofadjustment of the top roller horizontally as well as vertically, suchthat its position maybe altered in relation to the center lines of thehousings und 'to the feed and discharge rollers respectively.

The opening between the top roller and the feed roller of sugar-canemills is always greater than that between the top roller and thedischarge roller, and the crushing strain upon the cane between the toproller and the feed roller is always less than that between the toproller and the discharffe roller. In a twelve roller mill, for examp e,the openings between the rollers become gradually less successivelyinthe four mills, while the pressure applied to the top rollers by the'hydraulic jacks becomes greater. In View of these facts, it isdesirable to be able to adjust the position of the top roller of eachmill so as to cause the resultant line of force to be as nearlycoincident as possible .with the vertical center line of the housings.

This invention is particularly applicable to the improved type ofsugar-cane mills described and claimed in an application for patent,Serial No. 633,987, tiled June 19, 1911, by W. J. Dyer and myself. Onerea son why this invention is applicable to thisv type of mill is thatthe recess in the upper portion of the housing for the top rollerbearing can be made as large as desired, for the king bolts can beseparated to suit as they do not pass below the feed and dischargerollers as is customary in the usual type of mill.

The present invention consists in providing eccentric bushings for thebearings of the top roller jourm'ils, each made in two pieces for thepurpose of assembling, with means for preventing lateral displacementand for secutinV these bushings to prevent same from turning with theroller. also for thus-securing the bushings in any of various similarangulur )ositions such that their eccentricitv will alter the positionof the top roller with respect to t-he center lines ofthe housings undto the feed roller und discharge roller respectively, as willhereinafter more fully appear.

In the accompanying drawings, forming a part of this specification,'Figure 1 represents in side elevation a portion of a three rollersugar-cane mill embodying a preferred form of my invention. Fig. 2 is avertical section 'through the center of Fig. l. Fig. 8 is a sideelevation of a top bearing and :tu eccentric bushing, the latter beingshown turned through 90o from its position as shown in Fig. 1.

Referring to the drawings, the top rolle'r 1, the feed roller 2 and thedischarge roller 3, are of t-he usual construction. The housing 4 isprovided with'the cap 5 with a hydraulic ram 6 at its center. The tophenring 7 is adapted to slide vertically within the recess in the upperport-ion of the housing 4. A shoe 8 is placed above the top of 'toproller l. One or two annular tongues 11 are provided on the outside ofthe eccentric bushing 9 near its center, and are adapted tofit incorresponding grooves 12 formed in the bottom of the top bearing 7 andin the bottom of the recess 1n the housing 4 respectively. The annulartongues 11 rein force the eccentric bushing 9 and prevent itsdisplacement laterally. The eccentric bushing 9 is also provided with anumber of equally spaced lteyways 13, cut between the annular tongues 11and the ends of said bushing. Keys Al-are dovetailed or otherwisesecured in the top bearing 7 on .its center line between the grooves 12and its outer and inner faces respectively, said keys be` ing adapted tofit in any of the keyways 13 `journals until the in the eccentricbushing 9 which may be selected.

It will now be noted, that when the eccentric bushing 9 is in the normalposition, as shown'in Fig. 1, the center of the top roller is on thecenter line of the housing; that when the bushing 9 has been turned tothe position as lshown in Fig. 3, the center of the top roller has beenshifted horizon* tally the full -amount of the eccentricity of thebushing, and at the same tim-e this center has been raised an equalamount; and that when the bushing 9 1s in any one of 'the intermediatepositions, with the keys 14 in any of the intermediate keyways 13, thetop roller is shifted both horizontally and vertically to anintermediate position between the normal and extreme positions.

In assembling, the two parts of each ec' centric bushing 9 are fastenedtogether by the screws 10 so as to encirclethe journals of the toproller 1, and the roller is lowered in place in the housings 4, theannular tongues 11 fitting in the grooves 12. The top bearings Z arenext lowered in place, the eccentric bushings 9 being turned on the keys14 enter the corresponding keyways 13 selected. When the roller 1 israised sutliciently to take its weight off from the eccentric bushings9, the latter maybe readily turned on the journals by means of a Spannerwrench applied in a keyway 13.

When it is desired to change the position of the top roller, the topbearings 7 are raised so that the keys 14 will clear the eccentricbushings 9, whereupon these bushings may be turned in the manner abovedescribed.

I claim 1. In a sugar-cane mill, a roller, an eccentric bushing in vhichthe journal of the roller is mounted, a vertically movable bearingblock, and means associated with said bearing block and said bushing tolock the bushing against rotation when the said block is lowered and topermit the bushing to be circumferentially shifted when said block israised.

2. An adjustable bearing for a sugar-cane roller and the like,comprising a circumferentially shiftable bushing surrounding the journalof the roller, a vertically movable locking element adapted in theraised position to render said bushing shiftable and when in the loweredposition to lock said bushing against rotation.

3. In a sugar-cane mill, a roller, an eccentric bushing in which theroller is journaled, a. vertically movable bearing, a key carriedthereby and a key-way in the bushing adapted to be engaged by said keyto prevent rotation of the bushing, said bushing adapted to becircumferentially adjusted when said key is removed from the key-way byraising said bearing block.

4. A bearing for rollers and the like, comprising an eccentric bushingin which the roller is journaled, a series of key-ways peripherallyarranged thereon, a movable element mounted above said bushing andcarrying a key adapted to engage in any of said key-ways to lock thebushing against rotation, said bushing being circumferentiallyadjustable when said movable element is raised to bring the properkey-way under the said key.

5. A bearing prising an eccentric bushing provided with peripheralannular tongues to prevent lateral displacementand a series ofperipherally arranged recesses, a movable top bearing having lockingmeans to engage in said recesses to lock the bushing against rotation,said bushing being circumferentially adjustable when the top bearing israised to dis engage said locking means cesses.

6. In a sugar-cane mill, a roller, a housing, a top bearing'slidablevertically in said housing, an eccentric bushing provided with key-ways,and a key in the top bearing, substantially as and for the purposeescribed.

7. An adjustable bear-ing for sugar-cane rollers and the like,comprising an eccentric bushing provided with a key-way on itsperiphery, a bearing block surrounding said bushing, and a keycoperating with said recess and said bearing bushing againsty rotation,said bushing adapted to be circumferentially adjusted when said key isremoved from said recess. In'testlmony whereof I aiix my signature, 1npresence of two witnesses.

ARTHUR FnEDERicK EwAnT.

Witnesses I. P. KIMBALL, ROBT. J. PRATT.

block to lock theA from said re-

